Does not fit Rimowa suitcase telescopic pole

I had bought this bag to take them in addition to my Rimowa suitcase cabin as hand luggage on short trips. But unfortunately, the loop is on the back of the bag, with which it can be hung on the telescopic pole of a suitcase, not big enough for my Rimowa suitcase. It lacks about 1 cm. Thus the case for me is useless, even if it makes a good impression otherwise.